JPH0887965A - Image display phosphor screen and phosphor - Google Patents
Image display phosphor screen and phosphorInfo
- Publication number
- JPH0887965A JPH0887965A JP6223363A JP22336394A JPH0887965A JP H0887965 A JPH0887965 A JP H0887965A JP 6223363 A JP6223363 A JP 6223363A JP 22336394 A JP22336394 A JP 22336394A JP H0887965 A JPH0887965 A JP H0887965A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- image display
- ppm
- particle size
- brightness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Luminescent Compositions (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
(57)【要約】
【目的】 平板型画像表示装置の蛍光面の輝度向上を図
る。
【構成】 蛍光体面に使用されている赤、緑、青の蛍光
体であるＹ2Ｏ2Ｓ：Ｅｕ、ＺｎＳ：Ｃｕ、Ａｌ、Ｚｎ
Ｓ：Ａｇ、Ａｌのそれぞれの付活剤の濃度と、これら蛍
光体粉の粒径をそれぞれ特定範囲に限定した蛍光面構成
とする。(57) [Summary] [Purpose] To improve the brightness of the fluorescent screen of a flat panel image display device. [Structure] Red, green and blue phosphors used for the phosphor surface Y 2 O 2 S: Eu, ZnS: Cu, Al, Zn
S: Ag and Al activator concentrations and the particle size of these phosphor powders are limited to specific ranges.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、映像機器における画像
表示装置に関し、特に平板画像表示装置に好適な蛍光面
および蛍光体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device in video equipment, and more particularly to a phosphor screen and a phosphor suitable for a flat panel image display device.
【０００２】[0002]
【従来の技術】従来、画像表示装置の一種であるカラー
テレビジョン受像管のような陰極管のアノード部におい
て、赤、緑および青の各色を発光させる蛍光体がフォト
リソグラフィー法や、印刷法にて所要のパターンに塗り
分けられている。2. Description of the Related Art Conventionally, in an anode part of a cathode ray tube such as a color television picture tube which is a kind of image display device, phosphors which emit red, green and blue colors are used in a photolithography method and a printing method. Are painted in the required pattern.
【０００３】このようなアナログ変調方式で印加電圧が
２０〜３５ＫＶを必要とするカラーＴＶ受像管のアノー
ド部（蛍光体面）に用いられている蛍光体は、Ｐ−２２
が最適とされている（例えば、特開昭54-149570号公
報、材料化学vol.29 No.2 1992P.61参照）。The phosphor used in the anode portion (phosphor surface) of the color TV picture tube requiring an applied voltage of 20 to 35 KV in such an analog modulation system is P-22.
Is optimal (see, for example, JP-A-54-149570, Material Chemistry vol.29 No.2 1992 P.61).
【０００４】この蛍光体の中で、赤色についてはＹ2Ｏ2
Ｓ：Ｅｕ、すなわちイットリウムの硫酸化物に付活剤と
してＥｕ（ユーロピウム）を２モル％〜４モル％添加し
た平均粒径６〜１０μｍのものが用いられている（例え
ば材料化学vol.29 No.2 1992P.62、セラミックスvol.28
No.3 1993 P.275参照）。Among these phosphors, red is Y 2 O 2
S: Eu, that is, yttrium sulphate having 2 to 4 mol% of Eu (europium) as an activator and having an average particle diameter of 6 to 10 μm is used (for example, Material Chemistry vol.29 No. 2 1992 P.62, Ceramics vol.28
No.3 1993 P.275).
【０００５】又、緑色についてはＺｎＳ：Ｃｕ、Ａｌす
なわち、硫化亜鉛に付活剤としてＣｕ（銅）を１２０ｐ
ｐｍ、Ａｌ（アルミニウム）を２００ｐｐｍ添加した平
均粒径６〜１０μｍのものが用いられている（例えば蛍
光体ハンドブック オーム社昭和62年P.155、セラミッ
クスvol.28 No.3 1993 P.273参照）。For green color, ZnS: Cu, Al, that is, zinc sulfide with Cu (copper) as an activator at 120 p
pm, Al (aluminum) of 200 ppm added and having an average particle size of 6 to 10 μm are used (see, for example, Phosphor Handbook Ohmsha Ltd. 1987 P.155, Ceramics vol.28 No.3 1993 P.273). .
【０００６】又、青色についてはＺｎＳ：Ａｇ、Ａｌす
なわち硫化亜鉛に付活剤としてＡｇ（銀）を１００〜２
００ｐｐｍ、Ａｌ（アルミニウム）１００〜２００ｐｐ
ｍ添加した平均粒径６〜１０μｍのものが用いられてい
る（例えばセラミックスvol.28 No.3 1993 P.272〜P.27
3参照）。For blue, ZnS: Ag, Al, that is, zinc sulfide, is added with Ag (silver) 100 to 2 as an activator.
00ppm, Al (aluminum) 100-200pp
The average particle size added is 6 to 10 μm (for example, ceramics vol.28 No.3 1993 P.272 to P.27).
See 3).
【０００７】又一方、近年電子ビームをデジタル変調し
てカラーＴＶ表示を平板型表示にすることのできるパネ
ルが開発された（例えばカラーフラットビジョン O Pl
us E1994年4月号P.68〜P.74、特開平1-173553号公報、
特開平5-89801号公報、テレビジョン学会誌、vol.40 N
o.10 1986 P.1024〜P.1030参照）。On the other hand, in recent years, a panel capable of digitally modulating an electron beam to make a color TV display a flat panel display has been developed (for example, color flat vision O Pl.
us E April 1994 issue P.68-P.74, JP-A 1-173553,
JP 5-89801 A, Journal of the Television Society of Japan, vol.40 N
o.10 1986 P.1024 to P.1030).
【０００８】この平板型装置においても、カラーの色再
範囲を広くするためにカラーＴＶと同じＰ−２２蛍光体
（赤色がＹ2Ｏ2Ｓ：Ｅｕ、緑がＺｎＳ：Ｃｕ、Ａｌ、青
がＺｎＳ：Ａｇ、Ａｌ）が使用されている。Also in this flat panel type device, in order to widen the color re-coloring range, the same P-22 phosphor as the color TV (red is Y 2 O 2 S: Eu, green is ZnS: Cu, Al, blue is ZnS: Ag, Al) is used.
【０００９】[0009]
【発明が解決しようとする課題】従来、カラーテレビジ
ョン画像表示素子としては、ブラウン管が主として用い
られているが、ブラウン管では画面に比して奥行が非常
に長く、薄型テレビジョン受像機を製作することは不可
能であった。Conventionally, a cathode ray tube has been mainly used as a color television image display element, but the depth of the cathode ray tube is much longer than the screen, and a thin television receiver is manufactured. It was impossible.
【００１０】そこで、平板状の表示素子として、最近Ｅ
Ｌ表示素子、プラズマ表示素子、液晶表示素子が開発さ
れているが、いずれも輝度、コントラスト、色再現性等
の性能面で不十分である。Therefore, as a flat display element, recently, E
Although L display elements, plasma display elements, and liquid crystal display elements have been developed, they are all insufficient in terms of performance such as brightness, contrast and color reproducibility.
【００１１】そこでブラウン管並みの高品質の画像が得
られる電子ビームを用いて、カラーテレビジョン画像を
平板状の装置で表示することを目的として、スクリーン
上の画面をマトリックス状の区分にすき間なく分割し、
それぞれの区分毎に電子ビームをパルス変調して、偏
向、走査して蛍光体を発光させ、全体としてカラーテレ
ビジョン画像を構成する画像表示装置が開発されてい
る。Therefore, for the purpose of displaying a color television image on a flat panel device by using an electron beam capable of obtaining a high quality image comparable to that of a cathode ray tube, the screen on the screen is divided into spaces in a matrix form without gaps. Then
An image display device has been developed in which an electron beam is pulse-modulated for each section, deflected and scanned to cause a phosphor to emit light, thereby forming a color television image as a whole.
【００１２】この平板型画像表示装置は、色再現性等の
面から平均粒径６〜１０μｍのカラーＴＶ用Ｐ−２２蛍
光体粒子を使用している。This flat panel image display device uses P-22 phosphor particles for a color TV having an average particle size of 6 to 10 μm in view of color reproducibility and the like.
【００１３】ところが、この平板型画像表示装置は、電
子ビームの加速電圧が１０〜１５ＫＶと通常のカラーテ
レビジョン装置と比べて低いため、従来の付活剤濃度の
低い蛍光体では表示画面の輝度が低いという問題があっ
た。However, since the flat panel type image display device has an electron beam accelerating voltage of 10 to 15 KV, which is lower than that of a normal color television device, the brightness of the display screen is reduced by the conventional phosphor having a low activator concentration. There was a problem of low.
【００１４】本発明は、前記従来の問題点に留意し、色
再現性を損なわずに輝度の向上を計ることを目的とす
る。The present invention has been made in consideration of the above-mentioned conventional problems, and an object of the present invention is to improve luminance without impairing color reproducibility.
【００１５】[0015]
【課題を解決するための手段】前記目的を達成するため
に本発明は、赤、緑、青の蛍光体の付活剤の濃度を高め
ることと蛍光体粒子の粒径を変えることによって、低加
速電圧でも高輝度で、色再現性の良い蛍光面を実現する
ものである。In order to achieve the above-mentioned object, the present invention provides a low concentration by increasing the concentration of activators for the red, green and blue phosphors and changing the particle size of the phosphor particles. It realizes a fluorescent screen with high brightness even at an accelerating voltage and good color reproducibility.
【００１６】すなわち、Ｙ2Ｏ2Ｓ：Ｅｕについては、従
来の２〜４モル％よりも発光イオンであるＥｕの濃度を
増加させ、輝度の向上を図る。That is, for Y 2 O 2 S: Eu, the concentration of Eu, which is a light-emitting ion, is increased to increase the brightness as compared with the conventional 2 to 4 mol%.
【００１７】ＺｎＳ：Ｃｕ、Ａｌについては、付活剤の
Ｃｕ、Ａｌの濃度を従来の１００〜２００ｐｐｍより増
加させることにより、ドナー、アクセプター対濃度を増
やすことで輝度向上を図る。With respect to ZnS: Cu, Al, the brightness is improved by increasing the concentration of donor and acceptor by increasing the concentration of Cu and Al of the activator from the conventional level of 100 to 200 ppm.
【００１８】又ＺｎＳ：Ａｇ、Ａｌについても付活剤の
Ａｇ、Ａｌの濃度を従来の１００〜２００ｐｐｍより増
加させることによって同様に輝度向上を図る。With respect to ZnS: Ag and Al, the brightness is similarly improved by increasing the concentration of Ag and Al of the activator from the conventional level of 100 to 200 ppm.
【００１９】又上記赤、緑、青の各蛍光体の粒子径を２
〜６μｍと従来よりも小さくし、低加速電圧（５〜１５
ＫＶ）でも十分に電子線が蛍光体に侵入できるようにす
ることによっても発光効率を上げ輝度向上を図る。The particle diameter of each of the red, green and blue phosphors is 2
-6 μm, which is smaller than the conventional one, and low acceleration voltage (5-15
Even in the case of KV), the emission efficiency is increased and the brightness is improved by allowing the electron beam to sufficiently penetrate into the phosphor.
【００２０】[0020]
【作用】本発明によれば、蛍光体の付活剤濃度を加速電
圧（蛍光面に到達する電子の加速電圧）と電子線を制御
する方法に合わせて増加させること、および加速された
電子線が蛍光体に十分侵入できるための蛍光体粒子の粒
径微細化を図ることにより、平板型テレビ（低加速電圧
で電圧をパルス変調方式にしたテレビ）の輝度の向上を
図ることができる。According to the present invention, the activator concentration of the phosphor is increased in accordance with the accelerating voltage (accelerating voltage of electrons reaching the phosphor screen) and the method of controlling the electron beam, and the accelerated electron beam. It is possible to improve the brightness of a flat-panel TV (TV in which the voltage is pulse-modulated with a low acceleration voltage) by making the particle size of the phosphor particles fine enough so that the phosphor can sufficiently penetrate into the phosphor.
【００２１】すなわち、赤色蛍光体において通常のカラ
ーＴＶ（加速電圧２０〜３５ＫＶ、電子の量を電圧でア
ナログ変調する）では色調と輝度を最適化する場合、蛍
光体の平均粒径が６〜１０μｍで付活剤としてのＥｕの
濃度が２〜４モル％が必要となる。That is, in a normal color TV (acceleration voltage 20 to 35 KV, the amount of electrons is analog-modulated by voltage) in a red phosphor, when the color tone and brightness are optimized, the average particle diameter of the phosphor is 6 to 10 μm. Therefore, the concentration of Eu as an activator needs to be 2 to 4 mol%.
【００２２】しかし、平板型のＴＶ（加速電圧５〜１５
ＫＶ、電極に印加するパルス電圧の幅を制御するディジ
タル変調方式）用の蛍光体では、むしろＥｕの濃度を増
加させ、粉体の粒径を小さくすることにより、輝度向上
が図れる。However, a flat panel TV (accelerating voltage 5 to 15
In the case of a phosphor for KV, a digital modulation system in which the width of the pulse voltage applied to the electrodes is controlled), the brightness can be improved by increasing the Eu concentration and decreasing the particle size of the powder.
【００２３】又、Ｅｕの濃度を増加させてもパルス変調
方式のため色調の変化は少ない。又、青、緑系の蛍光体
は通常のカラーＴＶ用では平均粒径が６〜１０μｍで付
活剤であるＡｇ、Ｃｕ、Ａｌの濃度は１００〜２００ｐ
ｐｍが最適であり、それ以上では発光効率の低下と色調
変化が著しい。Further, even if the concentration of Eu is increased, the change in color tone is small due to the pulse modulation method. Further, the blue and green phosphors have an average particle size of 6 to 10 μm for ordinary color TVs and the concentration of Ag, Cu and Al as activators is 100 to 200 p.
The optimum value is pm, and above that range, the luminous efficiency is lowered and the color tone is significantly changed.
【００２４】しかしながら、平板型のＴＶのような低加
速電圧でディジタル変調用の蛍光体では、むしろＡｇ、
Ｃｕ、Ａｌ等の濃度を増加させた方がドナー、アクセプ
ター対が増加するために輝度向上が図れ、しかも色調も
あまり変化しない。However, in a phosphor for digital modulation with a low accelerating voltage such as a flat panel TV, Ag, rather,
Increasing the concentration of Cu, Al, etc. increases the number of donor-acceptor pairs, so that the brightness can be improved and the color tone does not change much.
【００２５】[0025]
【実施例】赤色の蛍光体として、Ｅｕを４．５モル％付
活剤として含有する平均粒径２．０μｍのＹ2Ｏ2Ｓを用
い、この蛍光体を平板型画像表示用陰極線管の内面に印
刷法にて所望のストライブ状に塗布する。EXAMPLE As a red phosphor, Y 2 O 2 S containing Eu at 4.5 mol% as an activator and having an average particle diameter of 2.0 μm was used, and this phosphor was used for a flat panel image display cathode ray tube. A desired stripe is applied to the inner surface by a printing method.
【００２６】次に、蛍光体面（カソード面）に印加する
パルス変調した電圧を１３ＫＶ、カソード電流８０μＡ
／ｃｍ2にした時の蛍光体面の輝度と色度点（ｘ、ｙ）
値を測定した。Next, the pulse-modulated voltage applied to the phosphor surface (cathode surface) was 13 KV, and the cathode current was 80 μA.
Luminance and chromaticity point (x, y) of the phosphor surface when set to / cm 2
The value was measured.
【００２７】その結果、輝度は３００ｃｄ／ｍ2、色度
点（ｘ、ｙ）は（０．６６０、０．３５０）であった。
この結果を（表１）の試料番号１に示す。As a result, the luminance was 300 cd / m 2 and the chromaticity point (x, y) was (0.660, 0.350).
The results are shown in Sample No. 1 of (Table 1).
【００２８】[0028]
【表１】 [Table 1]
【００２９】以下同様にして、蛍光体の種類、付活剤濃
度、蛍光体の粒径を変えた時の蛍光体の輝度と色度点
（ｘ、ｙ）の変化を試料番号２〜２２に示す。Similarly, changes in the luminance and chromaticity point (x, y) of the phosphor when the kind of phosphor, the concentration of activator, and the particle size of phosphor are changed are designated as sample numbers 2 to 22. Show.
【００３０】ただし、＊印を付した試料番号５〜８、１
２〜１５、１９〜２２は、本願発明外の比較例の試料で
ある。なお（表１）より、赤色蛍光体においてＥｕの濃
度が輝度向上がされにくく、又色度点も橙赤色の方向に
シフトするもので好ましくはない。However, sample numbers 5 to 8 marked with *
2 to 15 and 19 to 22 are samples of comparative examples other than the present invention. From Table 1, it is not preferable that the red phosphor is difficult to improve the luminance of Eu and the chromaticity point shifts in the orange-red direction.
【００３１】色調、輝度向上を同時に満足するのは、
４．５モル％〜７．０モル％の範囲である。又、粒径が
２．０μｍ以下でも６．０μｍ以上でも輝度向上は図り
にくい。To satisfy the color tone and the brightness improvement at the same time,
It is in the range of 4.5 mol% to 7.0 mol%. Further, it is difficult to improve the brightness even when the particle size is 2.0 μm or less or 6.0 μm or more.
【００３２】したがって粒径の最適な範囲は２．０μｍ
〜５．５μｍであることがわかる。又、緑色蛍光体にお
いて、Ｃｕ、Ａｌの濃度が２００ｐｐｍ以下あるいは１
７００ｐｐｍ以上では輝度向上は計れない。又蛍光体の
粒径が２．０μｍ以下あるいは６．０μｍ以上では輝度
向上が計れない。Therefore, the optimum range of particle size is 2.0 μm.
It can be seen that the thickness is ˜5.5 μm. In the green phosphor, the concentration of Cu and Al is 200 ppm or less or 1
Brightness cannot be improved at 700 ppm or more. If the particle size of the phosphor is 2.0 μm or less or 6.0 μm or more, the brightness cannot be improved.
【００３３】したがって輝度と色調を同時に満足するの
は、Ｃｕ、Ａｌの濃度が２００ｐｐｍ〜１５００ｐｐｍ
で、粒径が２．０μｍ〜５．５μｍの範囲であることが
わかる。Therefore, the brightness and the color tone are satisfied at the same time when the concentrations of Cu and Al are 200 ppm to 1500 ppm.
It can be seen that the particle size is in the range of 2.0 μm to 5.5 μm.
【００３４】同じく、青色蛍光体においてもＡｇ、Ａｌ
の濃度が２００ｐｐｍ以下では輝度向上が計れないし、
１３００ｐｐｍ以上では輝度はある程度向上できるが色
調の変化が大きくなってしまう。Similarly, in the blue phosphor, Ag, Al
If the concentration of is less than 200ppm, the brightness cannot be improved,
When it is 1300 ppm or more, the luminance can be improved to some extent, but the change in color tone becomes large.
【００３５】また粒径については、２．０μｍ以下ある
いは６．０μｍ以上では輝度向上が図れない。したがっ
て輝度と色調が同時に満足するのはＡｇ、Ａｌの濃度が
２００ｐｐｍ〜１３００ｐｐｍで、粒径が２．０μｍ〜
５．５μｍの範囲であることがわかる。With respect to the particle size of 2.0 μm or less or 6.0 μm or more, the brightness cannot be improved. Therefore, the brightness and color tone are satisfied at the same time when the concentration of Ag and Al is 200 ppm to 1300 ppm and the particle size is 2.0 μm.
It can be seen that the range is 5.5 μm.
【００３６】[0036]
【発明の効果】以上述べてきたように、蛍光体中の付活
剤の濃度を高めることによって、平板型テレビ（低加速
電圧で、電圧をパルス変調方式にした画像表示パネル）
の輝度を向上させることができる点産業上きわめて有益
な発明である。As described above, by increasing the concentration of the activator in the phosphor, a flat panel television (an image display panel in which the voltage is pulse-modulated with a low acceleration voltage).
It is an extremely useful invention in the industry in that it can improve the brightness of.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｊ 31/15 Ｅ (72)発明者 山下 勝義 大阪府門真市大字門真1006番地 松下電器 産業株式会社内─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical indication location H01J 31/15 E (72) Inventor Katsuyoshi Yamashita 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. Within
Claims (4)
および青の各色を発光する蛍光体が、所要のパターンに
て形成されている蛍光面において、上記赤の蛍光体は付
活剤としてＥｕを４．５モル％〜７．０モル％含有する
Ｙ2Ｏ2Ｓにて構成され、上記緑の蛍光体は付活剤として
ＣｕとＡｌをそれぞれ２００ｐｐｍ〜１５００ｐｐｍ含
有するＺｎＳにて構成され、上記青の蛍光体は付活剤と
してＡｇとＡｌをそれぞれ２００ｐｐｍ〜１３００ｐｐ
ｍ含有するＺｎＳにて構成されていることを特徴とする
画像表示用蛍光面。1. A phosphor screen, wherein phosphors emitting red, green and blue colors are formed in a required pattern on an inner surface of a cathode ray tube panel for image display. In the phosphor screen, the red phosphor is an activator. As a Y 2 O 2 S containing 4.5 mol% to 7.0 mol% of Eu as the active material, and the green phosphor is made of ZnS containing 200 ppm to 1500 ppm of Cu and Al as activators, respectively. The above blue phosphor contains Ag and Al as activators at 200 ppm to 1300 pp, respectively.
A phosphor screen for image display, characterized in that it is composed of ZnS containing m.
モル％含有し、その平均粒径が２．０〜５．５μｍのＹ
2Ｏ2Ｓから成る画像表示用赤色蛍光体。2. From 4.5 mol% to 7.0 using Eu as an activator.
Y with a mol% content and an average particle size of 2.0 to 5.5 μm
A red phosphor for image display composed of 2 O 2 S.
ｐｐｍ〜１５００ｐｐｍ含有し、その平均粒径が２．０
〜５．５μｍのＺｎＳから成る画像表示装置用緑色蛍光
体。3. Cu and Al as an activator, respectively.
ppm to 1500 ppm, with an average particle size of 2.0
A green phosphor for an image display device, which is made of ZnS of about 5.5 μm.
ｐｐｍ〜１３００ｐｐｍ含有し、その平均粒径が２．０
μｍ〜５．５μｍのＺｎＳから成る画像表示装置用青色
蛍光体。4. Ag and Al as the activators, respectively, 200
ppm to 1300ppm, with an average particle size of 2.0
A blue phosphor for an image display device, which is made of ZnS having a size of μm to 5.5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6223363A JPH0887965A (en) | 1994-09-19 | 1994-09-19 | Image display phosphor screen and phosphor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6223363A JPH0887965A (en) | 1994-09-19 | 1994-09-19 | Image display phosphor screen and phosphor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0887965A true JPH0887965A (en) | 1996-04-02 |
Family
ID=16796982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6223363A Pending JPH0887965A (en) | 1994-09-19 | 1994-09-19 | Image display phosphor screen and phosphor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0887965A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006120953A1 (en) * | 2005-05-10 | 2006-11-16 | Kabushiki Kaisha Toshiba | Green light emitting phosphor for display unit and field emission display unit |
| WO2006120952A1 (en) * | 2005-05-09 | 2006-11-16 | Kabushiki Kaisha Toshiba | Blue light emitting phosphor for display unit and field emission display unit |
| US7479732B2 (en) | 2003-03-13 | 2009-01-20 | Osram Opto Semiconductors Gmbh | Luminescence conversion of LED with phosphorescence effect, and use thereof and operational method associated therewith |
-
1994
- 1994-09-19 JP JP6223363A patent/JPH0887965A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7479732B2 (en) | 2003-03-13 | 2009-01-20 | Osram Opto Semiconductors Gmbh | Luminescence conversion of LED with phosphorescence effect, and use thereof and operational method associated therewith |
| CN100479204C (en) | 2003-03-13 | 2009-04-15 | 奥斯兰姆奥普托半导体有限责任公司 | Fluorescence conversion light-emitting diode with phosphorescence effect and application thereof |
| WO2006120952A1 (en) * | 2005-05-09 | 2006-11-16 | Kabushiki Kaisha Toshiba | Blue light emitting phosphor for display unit and field emission display unit |
| WO2006120953A1 (en) * | 2005-05-10 | 2006-11-16 | Kabushiki Kaisha Toshiba | Green light emitting phosphor for display unit and field emission display unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5619098A (en) | Phosphor and fluorescent display device | |
| KR100489575B1 (en) | Phosphor for display and field-emission display | |
| JP2809084B2 (en) | Field emission fluorescent display | |
| US5788881A (en) | Visible light-emitting phosphor composition having an enhanced luminescent efficiency over a broad range of voltages | |
| US5861713A (en) | Low voltage electron beam display apparatus having brightness increased by reducing an oxide inevitably formed on a surface of an oxisulfide phosphor on manufacture | |
| US6919683B1 (en) | High-brightness phosphor screen and method for manufacturing the same | |
| JP2937086B2 (en) | Phosphor and fluorescent display device | |
| US4814666A (en) | Electron-beam existed display tube, the screen of which has a fluorescent component of a Eu containing red fluorescent component and a blue or green fluorescent component | |
| JP2002226847A (en) | Phosphor for display device and field emission display device using the same | |
| KR100676352B1 (en) | Phosphor for display device, manufacturing method thereof, and color display device using same | |
| US4755717A (en) | Fluorescent display apparatus | |
| EP0094201A2 (en) | Cathodoluminescent particles for multicolour displays and method of manufacture thereof | |
| JP2944596B2 (en) | Method for manufacturing fluorescent display device excited by slow electron beam | |
| JP2795185B2 (en) | Display device | |
| KR20050109512A (en) | Green light emitting phosphor for low voltage / high current density and field emission type display including the same | |
| JP4804646B2 (en) | Low speed electron beam phosphor and fluorescent display tube | |
| JPH01304179A (en) | Phosphor for low-velocity electron beam and fluorescent display tube made by using this phosphor | |
| US20080265743A1 (en) | Green Light-Emitting Phosphor for Displays and Field-Emission Display Using Same | |
| JP2001107040A (en) | Phosphors and fluorescent display tubes | |
| JPH0329302Y2 (en) | ||
| JP3154132B2 (en) | Cathode ray tube | |
| JPH06139973A (en) | Flat type image display device | |
| JP2006312695A (en) | Blue light emitting phosphor for display device and field emission display device | |
| JPH0892551A (en) | Fluorescent display tube | |
| JPS58222180A (en) | Blue fluophor to be excited with low-velocity electron beam and display tube employing the fluophor |